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https://hdl.handle.net/1822/37134
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Campo DC | Valor | Idioma |
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dc.contributor.author | Wysoczanska, Kamila | por |
dc.contributor.author | Silvério, Sara C. | por |
dc.contributor.author | Teixeira, J. A. | por |
dc.contributor.author | Macedo, Eugénia A. | por |
dc.date.accessioned | 2015-09-11T10:51:54Z | - |
dc.date.available | 2015-09-11T10:51:54Z | - |
dc.date.issued | 2015-12 | - |
dc.date.submitted | 2015-04 | - |
dc.identifier.citation | Wysoczanska, Kamila; Silvério, S.; Teixeira, J. A.; Macedo, Eugénia A., Cation Effect on the (PEG 8000 + sodium sulfate and PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases. Journal of Chemical Thermodynamics, 91, 321-326, 2015 | por |
dc.identifier.issn | 0021-9614 | por |
dc.identifier.uri | https://hdl.handle.net/1822/37134 | - |
dc.description.abstract | The partitioning of four dinitrophenylated (DNP-) amino acids in aqueous two-phase systems of polyethylene glycol (PEG)-8000sodium sulfate and polyethylene glycol (PEG)-8000magnesium sulfate in five different tie-lines was experimentally determined at 298.15 K. The Gibbs free energy of transfer of a methylene group between the two phases was calculated from the measured partition coefficients. This characterizes the relative hydrophobicity of the equilibrium phases. Values of G(CH2) were in range from (-0.674 to -1.012) kJ·mol-1. A comparison of both systems was carried out. The results show that the cation type has a strong influence on the amino acids partitioning process. The largest relative hydrophobicity was noted for the ATPS system formed by sodium sulfate. This showed to be a better system for the separation. | por |
dc.description.sponsorship | FCT/MEC and FEDER under Programe PT2020 (Project UID/EQU/50020/2013), and co-financed by QREN, ON2 and FEDER (Projects NORTE-07-0162-FEDER-000050 and NORTE-07-0124-FEDER-0000011) | por |
dc.language.iso | eng | por |
dc.publisher | Elsevier 1 | por |
dc.rights | openAccess | por |
dc.subject | ATPS | por |
dc.subject | DNP amino acids | por |
dc.subject | Partitioning | por |
dc.subject | PEG | por |
dc.subject | Salts | por |
dc.title | Cation effect on the (PEG 8000 + sodium sulfate) and (PEG 8000 + magnesium sulfate) aqueous two-phase system: Relative hydrophobicity of the equilibrium phases | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | http://www.sciencedirect.com/science/article/pii/S0021961415002943 | por |
dc.comments | CEB22344 | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | 321 | por |
oaire.citationEndPage | 326 | por |
oaire.citationConferencePlace | United States | - |
oaire.citationTitle | Journal of Chemical Thermodynamics | por |
oaire.citationVolume | 91 | por |
dc.date.updated | 2015-09-07T13:35:47Z | - |
dc.identifier.eissn | 1096-3626 | - |
dc.identifier.doi | 10.1016/j.jct.2015.08.012 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Journal of Chemical Thermodynamics | por |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
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document_22344_1.pdf | 415,71 kB | Adobe PDF | Ver/Abrir |